A sample of a uranium compound is found to be losingmass gradually. Explain what is happening to the sample.

Q: How many grams of hydrogen H2 are produced by the reaction of 33 grams of magnesium Mg?

A: m H2 = ? m = 33 g Mg Mg + 2HCl --> H2 + MgCl2 MW H2 = 2 g/gmol MW Mg = 24.3 g/gmol MW MgCl2 =…

Q: Directions: Based on your understanding of the formation of heavier elementa during stellar…

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Q: Calculate the amount of Aluminum (AI) obtained by decomposing 9.8g of Aluminum oxide (Al203) (RAM…

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Q: p tthe uolume of 8.00M Hason inat is that solu te cabio9 a lmal). contains 9.809 a of HeSDu

A:

Q: Why is nitrogen more elctro negative than sodium?

A: Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond.

Q: What will happen to calcium phosphate Ca3 (PO4) 2 when heated from 60 ° C to 100 ° C?

A: The solubility product of Ca3(PO4)2 is 2.0 X 10-29

Q: An alloy of solder is tin and lead. Calculate the number of moles in each that are present in 100…

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Q: copper and silver nitrate react and recovers 5.2 g AG.  After mass to mass stoichiometry maximum…

A: Given that:                         Amount of silver recovers = 5.2 g            Theoretical yield…

Q: n determination of Sulfur as Barium Sulfate, Why is digestion not necessary in this determination

A: Given: To explain determination of Sulfur as Barium Sulfate, Why is digestion not necessary?

Q: 38) Sulfurous acid pand Salfer diml 1.239 of sulfurous acid unlergaes this reaction, what mass IS…

A:

Q: 6. How many moles of calcium will react with 2.00 grams of:

A: the balanced equation of Ca with each acid is given below  a. Ca +  2 HCl  -------- >  CaCl2   +…

Q: Whats the chemical and physical properties of Potassium ?

A:

Q: A mixed with extraneous matter sample containing aluminum (Al) weighs 1.35 g. the sample a was…

A: Wt. Of Sample = 1.35 g Mass of Al2O3 ppt. = 255.00 mg = 255 * 10-3 g Molar Mass of aluminum = 27.00…

Q: What is the reason which makes any atom highly reactive?

A: Valence shell can be defined as the outermost shell of an element. Atom of the every element have…

Q: Which of these three elements ( Cl2, Br2, I2) is most volatile?

A: The volatility of a compound depends on the intermolecular force present in it. The higher the…

Q: 8192g0 heafed behind L The NiSO Hydrate Calcula 9Thhe mas hydrate bThe CThe 'mole mo d The rati…

A: a.) 3.366 g b.) 0.187 moles H2O c.) 0.0312 moles NiSO4 d.) Ratio= 6 e.) x=6, NiSO4.6H20

Q: A 0. 4054 g solid organic sample containing covalently bound bromide and no other halogens was…

A: Given,  Mass of sample = 0.4054 g = 0.4054g × 1000 mg/ 1g = 405.4 mg Mass of silver bromide produced…

Q: ng of the (321) pla ation is used (X=1 ction?

A: i). The reciprocal parameter can be obtained using the following relation.

Q: Fe,0.t 3 Ha ca) a) AH" a AG at 230°C

A: The reaction given is, => Fe2O3 (s) + 3 H2 (g) → 2 Fe (s) + 3 H2O (g)

Q: A student is given a 1.3002 g of an unknown copper compound. Following isolation by displacement by…

A:

Q: You started your preparation of common alum with 1.4971 g of aluminum foil. What is the theoretical…

A: Formula of alum is KAl(SO4).12 H2O Molar mass is 474.38 g/mol We have to calculate theoritical…

Q: iven the following information:

A: Stronger the Bronsted-Lowry acid is that much weaker is the conjugate Bronsted-Lowry base and…

Q: 4oloctron uminum lóA AlT ఆంం canfiquratioA Ale 3+ lán Al

A: To find out the electronic configuration of an ion at first, find out the electronic configuration…

Q: 47) For each of the fallowing unbalanccel equation, by calculation which, reactant is the Limiting…

A: Given balanced reaction,     NaHCO3(s) + HCl(aq) → NaCl(aq) + H2O(l) + CO2(g) Mass of each reactant…

Q: 7. What is the role of Pd in the production of H,0, seen in this reaction? Explain the process…

A: Hydrogen peroxide is a usefull oxidising agent. It is a desirable oxiadnt because the only by…

Q: How’s would you explain to a friend what you have learned about why lead contamination happened in…

A: Presence of high levels of lead (Pb) is very much detrimental to health. It causes damage to the…

Q: Calculate ΔE in kilojoules per mole for the following reaction:               Th → He + Ra Atomic…

A: The following formula will be applicable to solve for the answer. ∆E=∆m×c2 where, '∆E' is the change…

Q: 14) If 0.600 moles of NH3 were produced, how many moles of H2 are required?

A: Reaction involved for formation of NH3 N2(g)+3H2(g)------>2NH3 No. of moles of NH3 produced=0.600…

Q: HOOH MnOz catalyst H, Ot O2 (gas) 2 Ce) HzO+ ē -> Kelectrons HCQ + NH3

A: 1.In the 1st Reaction MnO2 is source of oxygen. HCOOH+ O2---->H2O + CO2 C is 1 in both side. H is…

Q: What is an alkali? Give an example.

A: Given What is an alkali? Give an example.

Q: Sr + _02→_SrO How many moles of strontium would synthesize with 3.5 moles of O2?

A: Explanation to the correct answer  is given below

Q: Which of the following is not an application of colorimeter? O Paints O Inks O Cosmetics O…

A: This question of colorimeter is taken from single and double beam instrument in portion colorimeter.…

Q: If 5.36 moles of Aluminum react sufficient oxygen, how many moles of Al2O3  should form?

A: moles of Al2O3  should form, If 5.36 moles of Aluminum react sufficient oxygen will be:

Q: A 0.5664 g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in…

A: The ore sample contains aluminum and is extracted using dissolution and filtration. The solution is…

Q: d) How many grams of water can be produced when 189 g hydrazine combine with 160.g hydrogen…

A:

Q: A student is given a 1.3308 g of an unknown copper compound. Following isolation by displacement by…

A: Given,      Mass of the unknown Copper Compound =1.3308 g      Mass of Copper (Cu) Metal recovered…

Q: The halogen in the second period. CI Br O.F O At

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Q: An ore is analysed lor the manganese content by converting the mangnese to Mo and woghing a152g…

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Q: What is the mass percentage of C in codeine, C18H21NO3?

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Q: How many grams of water would be lost if a 2.000 gram sample of CsF:1½H2O were heated?

A: Given : Mass of CsF.1½H2O = 2.000 g Molar mass of CsF.1½H2O = Atomic mass of Cs + Atomic mass of F +…

Q: Dunat are the paducts dusts from the singe-replacement reacttiano curs)+ AgNOgfag

A: Answer - A single replacement reaction, sometimes called a single displacement reaction, is a…

Q: A 0.8965g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in…

A: Since you have asked a question with multiple sub-parts, we will solve first three subparts for you.…

Q: which is one of the most abundant element in the universe?

A: The measure of existence of a given element in comparison to other all elements is known as the…

Q: O Radium O Magnesium O Strontium O Beryllium O O O

A: We are given 4 different elements and we have to predict the element with maximum tendency to form…

Q: Consider the balanced reaction 7 A + 6 B → 4 C + 7 D. If 3.361 moles of D (MW = 35.3) are produced,…

A:

Q: Be C

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: PROFILE OF LEAD: PLEADE COMMENT IN SOME EXTEND THE PHYSICAL AND CHEMICAL PROPERTIES OF HEAVY METAL…

A: Heavy metals are commonly environmentally stable elements. They possess high specific gravity and…

Q: What is mean by scavenger

A: Definition Simply put, scavengers are creatures that frequently eat other dead organisms and animals…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.